/**
    @page building Building instructions

    ###########################################################################
    @section cmake Cmake build system
    ###########################################################################

    HepMC3 is built using CMake and is fully compatible with c++11.
    Following options are available:

    @code{.cpp}
        cmake -DCMAKE_INSTALL_PREFIX=<installation path> \
              -DHEPMC3_BUILD_EXAMPLES=ON|OFF \
              -DPYTHIA8_ROOT_DIR=<path_to_pythia8180_or_later> \
              -DROOT_DIR=<path_to_root_bin_dir>
    @endcode

    @note Path to pythia8 is used for examples only

    @note Path to ROOT is optional. If not provided, CMake will attempt to find
          default ROOT installation. If no installation is present, ROOT I/O
          will not be available. Please note that cmake configuretion file supplied with
          ROOT distribution (ROOTUseFile.cmake) might require higher version of cmake than HepMC3 itself.

    @note cmake is set to detect c++11 support by default. 

    Last update 24 Jan 2019
*/
